Murmur : Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Murmur"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Murmur (MIR73.JRG)
By Jeff R. Graham
Copyright 2005
85.5% light Return
Angles for R.I. = 1.62
61 facets + 10 facets on girdle = 71
10-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.262 T/L = 0.250 P/W = 0.426
C/W = 0.260 H/W = (P+C)/W+0.02 = 0.706 P/H = 0.603 C/H = 0.369 Vol./W^3 = 0.238
PAVILION
CROWN
Addition # 10 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is pretty neat, it has a very flower-like look and is a different looking round. It is fun and fast to cut and works well in any light to medium colored material. I like Tourmaline.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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